Repair shield



May 4 1926.

J. H. BUR ET M Re. 16,341

REPAIR SHIELD Orizinal Filed Jan. 12., 1924 6 INVENTORJ A TTORNEYSZReissued May 4, 1926.

UNITED STATES PATENT OFFICE.

JAMES H. BUBROW AND GEORGE A. BURROW, 0F SPOKANE, WASHINGTON, ASSIGNORSTO BUBBOW MANUFACTURING COMPANY, OF SPOKANE, WASHINGTON, A COR- PORATIONOF WASHINGTON-- REPAIR SHIELD.

Original No. 1,528,044, dated March 3, 1925, Serial No. 685,795, filedJanuary 12, 1924. Application for reissue filed January 16, 1926.

To all whom it may concern:

Be it known that we, JAMES H. BURROW and Gnoncn A. BUnRow, citizens ofthe United States, residing at Spokane, 111 Spokane County and State ofWashington, have invented certain new and useful Improvements in RepairShields, of which the following is a specification. 7

The present invention relates to improvements in repair shields or bootsfor use between the outer casing and inner tubes of tires to close apuncture or reinforce a damaged casing. The primary object of theinvention is the provision of a device of this character which iscomparatively inexpensive in cost of production and which is sofashioned and constructed that it may with facility be applied forusewithout the necessity for expert knowledge on the part of the user. Whenin position for use on the inner tube, the shield by its formation andconstruction readily adjusts itself when the tire is inflated and fitsneatly into place to present a smooth structure between the casing andinner tube. Due to the wrapping of the shield about the tube and theformation of the shield when in place, the danger of pinching the innertube is eliminated, and means are provided whereby the shield isproperly positioned and is anchored 1n the position against displacementwithin the damaged casing of the tire.

The invention consists in certain novel features of construction andcombinations and arrangements of parts for accompllshing the above ends,as will hereinafter be more fully pointed out and claimed.

In the accompanying drawings we have illustrated one complete example ofthe physical embodiment of our invention wherein the parts are combinedand arranged in accordance with the best mode we have so far devised forthe practical application of the principles of our invention.

Figure 1 is a perspective view of a shield according to our inventionshown in rolled position, ready to be unrolled and wrapped about aninner tube.

Serial No. 81,859.

Figure 2 is a view of the shield unrolled and showing the inner facethereof.

Figure 3 is a detail sectional View, enlarged, showing an edge of theshield.

Figure 4 is a detail sectional view, .en-

larged, showing an edge of the intermediate anchoring portion of theshield.

'As now in actual use the shields are fashioned in various sizes and aremanufactured on suitable mandrels adapted for the purpose in order thatthey will conform to the curvature of the tire. The shields are preparedor manufactured for shipment and sale in the' form shown in Figure 1 ofthe drawings and they may readily be unrolled from this form for facileapplication to the tire.

The shield as shown is preferably of fabric, either in a singlethickness or of cemented layers, and is formed in three portions as theinner narrow portion 1 which is wrapped directlyon the tube; the outerwrapper portion 2 which is narrower than the inner portion; and anintermediate anchoring portion 3. The portion 1 is designed to bewrapped on the tube with the intermediate portion 3 at the inner side ofthe tube, and the wrapper portion 2 is designed to be wrapped around theinner portion as indicated in Figure 1.

At its ends the intermediate portion is provided with extensions 4 and 5projecting beyond the greatest width of the shield, and as seen inFigure 4 those lips or extensions are comparativelythinner than the bodyof the shield or the anchoring'portion 3 in order that they may liesnugly between the tube and the casing of the tire and prevent theformer being pinched between the casing and the shield.

The outer edges of the shield are also much thinner and more flexiblethan the body of the shield as indicated in Figure 3 where a rubberstrip 6 is cemented to the outer face of the shield. As shown, thisstrip may be cemented to a layer of the fabric of which the shield iscomposed. The presence of these comparatively thin and more flexibleedges for the shield not only prevents pinching of the tube, but theyalso insure a smooth joint for the encased shield. The edge strip asindicated in Figure 1 passes around the edge of the shield on its outerface, while the inner face of the shield, as indicated in Figure 2 is asmooth plane face for contact with the inner tube and with the innerwrapped part of the shield.

The shields are of the proper length to be wrapped or passed twicearound the tube leaving the ends of the shield free for movement whenthe tube is inflated in order that the tube may adjust itself to theinflated tire. The intermediate portion 3' however remains stationary atthe inner side of the tube and within the casing, and "because of itsincreased thickness and curvature it is less flexible than the wrapperportion of the shield. Whenthe shield has been adjusted to the tube,placed within the casing, and the, casing. mounted upon the rim in; theusual manner, the inflation ofthe tube will tend to expand the wrapping.portions and will also tend to force the anchoring portion against themeeting margins of the rim engaged portion of the casing. The contouredwrapping portions necessarily conform to the surface of the inflatedinner tube and to the. enclosing casing. without any tendency to wrinkleor fold, being interposed between the tube and its casing and normallycontoured both longitudinally and in cross section. to the form of thearcuate portion of the tube which they embrace. The anchoring portion issimilarly contoured to fit between the tube and the casing on the innerside, but is relatively stiff and thick whereby it offers considerableresistance to the pressure of the air in the tubewhich tends-to forcethis anchoring. portion-bee tween the marginal portions of the casing.Being on the inner side, its central axis is in an are within thesmallest circle of the tube, and its correspondingly increasedcurvature, coupled with its comparative rigidity,.are material factorsin preventing any tendency to creep rotatively, or tobecome wrinkled ordistorted. Thus the intermediate portion becomes anchoredat theinnerside of the tire tube and remainsstationary when the tube is inflated,but permits the two wrapped portions of the shield to adjust themselvesas the cross-area of the tube is increased. After the tube has beeninflated the shield is held in stationary position and is prevented fromcreeping around the tire because of the thin flexible edges of theshield which permit a close frictional contact between it and the tubeand its easmg.

Because of the construction of the shield with itsintermediat'esemi-rigid anchoring portion,- which conforms in curvatumto the innerportion of the tire tube, expert knowledge in applying the shield is notrequired, as the utility and applicability of this anchoring portion tothe inner portion of the tube will readily beapparent and the anchoringportion could not within reason he place-din the incorrect position withrelation to the tube. With the intermediate portion anchored instationary position it will be apparent thatjthe two ends of the shieldare held in close frictional contact and a double hold is; secured notonly on the shield itself but between the shield and tube and betweenthe shield and casing, to prevent loosening of the shield after the tirehas 7 been inflate-d,

From the above description taken in connection with the drawings it willbe evident that we have provided a device of this characterwhich-fulfills the condition set forth as the object of our invention,and as is evidenced by the extensive use to which the device has beenapplied in the market.

Having thus fully described our invention what we claim as new and"desire to secure by Letters Patentisl. A repair shield having anintermediate anchoring portion adapted to. engage the inner side of atire tube and inner and outer portions one of which is adapted to wraparound the tube and theother to encircle the wrapped ortion.

2. Arepair shield having an intermediate anchoring portion adapted toengage the inner side of a tire tube, thin, flexible extensions at theends-of -said anchoring portion,

extensions on said anchoring portion, an inner integral: portion adaptedto wrap about a tire tube, an outer integral portion adapted to encirclethe inner wrapped portion, and a thin flexible edge strip on saidportions.

4. A repair shield having' a wrapping portion contoured in ponforrjnitywith the surfaces of the tiretubetowhich it is to be applied, incombination with a relatively stiff arcu-ate anchoring portion having asurface contoured in con-forinitywith theinner side of the tire tube.-

5. A repair shield for pneumatic tires, comprising a wrapping portioncontoured in conformity withthe surfaces of the tire tube towhich it isto be applied, in combination with a normally arcuate anchoring portionhaving a surface normally contouredin conformitywiththe inner side-ofthe tire tube, said'anchoring portion being adaptedto resistpressurestending to distort it from its normal contour,

6. A repair shield having-a wrapping. por-v tion contoured; in Iconformity with "the sur; faces of the tire tube to which'it is to beapplied, in combination with a relatively thick arcuate anchoringportion having one surface contoured in conformity with the inner sideof the tire tube and another surface adapted to conform generally to thecontour of the rim engaged portions of an outer casing for such tube,said anchoring portion having relatively thin flexible end extensions tobe engaged between the tube and said portions of the casing beyond theportion of the tube embraced by said wrapping portion.

7. A repair shield having an anchoring portion and a set of wrappingportions, said ancho ring and wrapping portions being each contoured tofit between an arcuate portion of a tire tube and its enclosing casingwith the anchoring portion interposed between the inner side of the tubeand the rim engaged ortions of the casing and being relatively t ick,intermediate of its ends, as C0111- pared with the wrapping portions.

8. A repair shield having an arcuate anchoring portion provided withrelatively thin flexible extensions, in combination with an innerwrapping portion adapted to wrap about a tire tube and normallycontoured in conformity with the embraced arcuate portion of such tubeand an outer wrapping portion adapted to encircle the inner wrappingortion and normally contoured in conormity therewith.

9. A repair shield having an arcuate anchoring portion and connectedwrapping portions, each of said portions being contured in normalconformity to the form of an arcuate portion of a tire tube, and saidanchoring portion being relatively resistant to distortion from itsnormal contour.

10. A repair shield having a semi-rigid arcuate anchoring portionnormally conforming in curvature to the inner portion of a tire tube andadapted to be received between said tube and the rim engaged portions ofan associated casing.

11. A repair shield comprising a pair of wrapping portions normallycontoured in general conformity to an arcuate portion of a tire tube tobe embraced thereby with the wrapping portions in superposed relation toeach other and an arcuate connecting portion normally contoured to fitthe inner surface of the tube and connecting the inner margins of thewrap ing portions.

J AMES H. BURROW. GEORGE A. BURROW.

